SUCTION DEVICE

Abstract

 The present invention relates to a suction device including a shell with a chamber. The chamber is provided with an opening. A fan is disposed in the chamber, and the opening is disposed in a rotating axial direction of the fan. A power component for driving the fan to rotate is disposed on the shell, and an external fluid source is disposed outside the shell. Another fluid is disposed in the external fluid source, and the external fluid source is connected to the chamber. The another fluid of the external fluid source flows into the chamber to occupy a volume in the chamber, and partially or completely squeezes an original fluid originally present in the chamber out of the chamber. The fan drives fluids in the chamber to rotate, so that a stepped negative pressure is generated in the chamber. The original fluid is located in the central region of the chamber, and the another fluid is located in the peripheral region of the chamber. A closer distance to the periphery of the chamber indicates a lower negative pressure, thereby remarkably lowering pressure difference of the inner and outer side of the shell. The problem of vacuum leakage caused by a large pressure difference between the inner and outer sides of the edge of the shell is resolved thoroughly. The suction device according to the present invention has the characteristics of simple structure, less vacuum leakage, large adsorption force, etc.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of negative pressure adsorption technologies of a rotating fluid flow, and in particular, to a suction device.

BACKGROUND

[0002] Vacuum adsorbers are widely used in object handling equipment of automated production lines and are very useful automated devices. The structure of a common vacuum adsorber is shown in FIG. 1. The vacuum adsorber generally consists of a vacuum source 1' (a vacuum pump, etc.) and an adsorption chamber 2' that are connected to each other. The vacuum source 1' sucks the fluid in the adsorption chamber 2' to form a vacuum in the chamber, thereby generating an adsorption force and sucking up the workpiece 3' placed under the adsorption chamber 2'. Such a vacuum adsorber has serious technical drawbacks: because the negative pressure distribution in the adsorption chamber 2' is almost uniform, a severe pressure difference forms between the inner and outer sides of the edge of the adsorption chamber 2' (an environmental pressure is present on the outer side of the edge of the adsorption chamber 2', and a vacuum is present on the inner side of the edge of the adsorption chamber 2'). Due to the pressure difference, the external fluid is sucked into the adsorption chamber 2'. Especially when the surface of the workpiece 3' is rough, there are many gaps between the adsorption chamber 2' and the workpiece 3', and the external fluid will massively enter the adsorption chamber 2' of the vacuum adsorber through these gaps and destroy the vacuum in the adsorption chamber 2', causing the adsorption force of the adsorption chamber 2' to be significantly lowered, thereby resulting in the failure of the workpiece adsorption function of the vacuum adsorber.

SUMMARY

[0003] The technical problem to be resolved by the present invention is to provide a suction device to solve the problem of vacuum leakage caused by the pressure difference between the inner and outer sides of the edge of the adsorption chamber. Although the structure is simple, the adsorption capacity of the adsorption chamber is remarkably improved.

[0004] The present invention is implemented in such a way: a suction device is provided, including a shell, the shell is provided with a chamber, the chamber is provided with an opening, a fan is disposed in the chamber, the opening is disposed in the rotating axial direction of the fan, a power component for driving the rotation of the fan is disposed on the shell, an external fluid source is disposed outside the shell, another fluid is disposed in the external fluid source, the another fluid is different from the original fluid originally present in the chamber, the external fluid source is connected to the chamber, the another fluid of the external fluid source flows into the chamber to occupy the volume in the chamber, and partially or completely squeezes the original fluid originally present in the chamber out of the chamber, and the fan drives fluids in the chamber to rotate.

[0005] Further, the density of the another fluid is greater than that of the original fluid in the chamber.

[0006] Further, the shell is further provided with a suction hole, one end of the suction hole is connected to the region of the chamber where the another fluid is not present, and the other end of the suction hole is connected to a vacuum source.

[0007] Further, the shell is also provided with an inflow hole, the external fluid source is connected to the chamber through an inflow pipe, the another fluid of the external fluid source flows from the external fluid source into the chamber through the inflow hole or flows out of the chamber to the external fluid source, the fan drives fluids in the chamber to rotate, and the external fluid source is further provided with a flow regulating device.

[0008] Further, the shell is further provided with one or more inflow holes, the external fluid source is connected to the chamber through the one or more inflow holes, one or more other fluids are disposed in the external fluid source and flow from the external fluid source into the chamber through the inflow holes or flow out of the chamber to the external fluid source, the one or more other fluids are different from the original fluid in the chamber, and the fan drives fluids in the chamber to rotate.

[0009] Further, the external fluid source further includes a water tank disposed outside the shell, another fluid is disposed in the water tank, the water tank and the chamber are interconnected, and the water tank and an external environment of the shell are also connected to each other.

[0010] Further, the another fluid in the water tankgroove is connected to the chamber through a gap existing between the shell and an adsorbed surface, or is connected to the chamber through a connecting flow channel disposed on the shell.

[0011] Further, the bottom of the outer wall of the water tank is provided with a soft sealing body for blocking the gap between the outer wall of the water tankwater tank and the adsorbed surface.

[0012] Further, the water tankwater tank is a semi-closed water tankwater tank with the top and side walls closed, and the water tankwater tank is provided with an input hole through which the another fluid flows into the water tankwater tank.

[0013] Further, the water tankwater tank is respectively connected to an external tank of the another fluid through an input pipe and a return pipe, and a pump is mounted on the input pipe.

[0014] Further, the shell is further provided with one or more pressure sensors, and the pressure sensor is used to sense pressure changes within the chamber.

[0015] Further, the original fluid is a gas and the another fluid is a liquid.

[0016] Compared with the prior technology, the suction device of the present invention is provided with a fan in a chamber in a shell, and the fan is driven to rotate by a power component; the chamber is provided with an opening; and another fluid is introduced into the chamber to occupy the volume of the chamber, and partially or completely squeezes the original fluid in the chamber out of the chamber; and the fan drives fluids in the chamber to rotate, so that a negative pressure distribution with gradient changes is generated in the chamber. The original fluid is located in a central region of the chamber, and the another fluid is located in a peripheral region of the chamber. A closer distance to the periphery of the chamber indicates a lower negative pressure, thereby remarkably lowering pressure difference of the inner and outer side of the shell. The problem of vacuum leakage caused by a large pressure difference between the inner and outer sides of an edge of the shell in a conventional adsorption mode is resolved thoroughly. The suction device of the present invention is characterized by having simple structure, small vacuum leakage and stable adsorption force, being capable of adsorbing a rough surface, and so on.

BRIEF DESCRIPTION OF DRAWINGS

[0017] 

FIG. 1 is a schematic diagram showing a structure of an existing vacuum adsorber;

FIG. 2 is a schematic planar cross-sectional view showing a first preferred embodiment of the present invention;

FIG. 3 is a schematic diagram showing a pressure difference distribution of a fluid in a chamber in FIG. 2;

FIG. 4 is a schematic planar cross-sectional view showing a second preferred embodiment of the present invention;

FIG. 5 is a schematic planar cross-sectional view showing a third preferred embodiment of the present invention;

FIG. 6 is a schematic planar cross-sectional view showing a fourth preferred embodiment of the present invention;

FIG. 7 is a schematic planar cross-sectional view showing another implementation of the fourth preferred embodiment of the present invention;

FIG. 8 is a schematic planar cross-sectional view showing a fifth preferred embodiment of the present invention;

FIG. 9 is a schematic planar cross-sectional view showing a sixth preferred embodiment of the present invention; and

FIG. 10 is a schematic planar cross-sectional view showing a seventh preferred embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

[0018] To make the technical problem to be resolved in the present invention, technical solutions, and beneficial effects of the present invention clearer and more comprehensible, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

Embodiment 1

[0019] Referring to FIG. 2, a suction device according to the first preferred embodiment of the present invention includes a shell 1, where a chamber 2 is provided in the shell 1. The chamber 2 is provided with an opening 4, and an end face of the opening 4 is an adsorption surface of the suction device and is used for adsorbing a workpiece 3. There is a gap C between the shell 1 and an adsorbed surface of the workpiece 3.

[0020] A rotatable fan 5 is disposed in the chamber 2. The opening 4 is disposed in the rotating axial direction of the fan 5. A power component 6 for driving the fan 5 to rotate is disposed on the shell 1. An external fluid source 9 is disposed outside the shell 1, and another fluid B is disposed in the external fluid source 9. The another fluid B is different from the original fluid A originally present in the chamber 2. The external fluid source 9 is connected to the chamber 2, and the another fluid B of the external fluid source 9 flows into the chamber 2 to occupy the volume in the chamber, and partially or completely squeezes the original fluid A originally present in the chamber 2 out of the chamber. The fan 5 drives fluids in the chamber 2 to rotate, and the rotating fluids include the original fluid A and the another fluid B.

[0021] The shell 1 is further provided with an inflow hole 7. The external fluid source 9 is connected to the chamber 2 through an inflow pipe 8. The another fluid B in the external fluid source 9 enters the chamber 2 through the inflow pipe 8 and the inflow hole 7 or flows out of the chamber 2 to the external fluid source 9. The another fluid B fills all or part of the space inside the chamber 2.

[0022] The density of the another fluid B is greater than that of the original fluid A. The original fluid A is a gas and the another fluid B is a liquid. Specifically, the original fluid A is air and the another fluid B is water. Alternatively, the original fluid A is air and the another fluid B is oil.

[0023] In this embodiment, the original fluid A is air and the another fluid B is water, and the description will be continued by using this as an example.

[0024] The working principle of this embodiment is that the rotary power component 6 drives the fan 5 to rotate around a vertical shaft in the chamber 2 in an illustrated arrow direction. At the same time, the external fluid source 9 injects water into the chamber 2 through the inflow hole 7 of the inflow pipe 8, as indicated by an illustrated arrow direction. If the water only fills part of the space inside the chamber, the fan 5 simultaneously drives the air and water in the chamber 2 to rotate. Since the density of water is greater than that of air, due to the effect of the centrifugal force of the rotating fan 5, the water with a large density is distributed in a peripheral region of the chamber 2, and the air with a small density is distributed in a central region of the chamber 2. If there is a gap C between the chamber 2 and an adsorbed surface of the workpiece 3, the water of a rotating water layer distributed at the inner edge of the chamber 2 flows out of the chamber 2 through the gap C, as indicated by an illustrated arrow direction; at the same time, the external fluid source 9 continuously inputs the water into the chamber 2 to supplement the corresponding amount of water, as indicated by an illustrated arrow direction. If the amount of water flowing out of the chamber 2 through the gap C is relatively large, the water supply amount of the external fluid source 9 is increased accordingly; and if the amount of water flowing out of the chamber 2 through the gap C is relatively small, the water supply amount of the external fluid source 9 is reduced accordingly. That is, the external fluid source 9 has a function of adjusting the amount of water. There may be many specific implementations. For example, a water pump with a variable flow is disposed in the external fluid source 9. For another example, a flow regulating device (not shown), such as a switching valve, is disposed at the position of the inflow pipe 8 of the external fluid source 9. The amount of water flowing out is adjusted by the frequency of the switching valve.

[0025] The water and air rotating at a high speed in the chamber 2 form a pressure distribution as shown by a solid line in FIG. 3. The present invention can achieve the following beneficial effects:

(1) Under the action of the centrifugal force, a depressing pressure distribution is formed in the chamber 2. The pressure gradient of the rotating water layer is very sharp because of the large density of water, and therefore, a very large negative pressure is formed in the chamber 2; the density of the air is small, so that only a relatively small pressure gradient is formed in the central portion of the chamber 2. The suction device of the present invention greatly increases the degree of vacuum and the adsorption force in the chamber 2 by utilizing the characteristic that the density of water is much greater than that of air. The pressure distribution shown by a dashed line in FIG. 3 is the pressure distribution under the conditions that the chamber is full of air (i.e., without injecting another fluid into the chamber), and the degree of vacuum formed is much smaller than that of the solid line. Injecting another fluid with a greater density into the chamber 2 is the key to achieving this beneficial effect. If the chamber 2 is completely filled with another fluid, a pressure distribution as shown by dot-and-dash lines in FIG. 3 can be formed. The degree of vacuum will increase further and the adsorption force will also become larger.

(2) It can also be seen from the pressure distribution of FIG. 3 that the pressure formed by the rotating water layer gradually varies, and the pressure at the outermost periphery of the space inside the chamber 2 (i.e., the inner side of the shell 1) is very close to the zero gage pressure. This means that there is no large pressure difference between the inner side and the outer sides of the shell 1, so that the problem of vacuum leakage between the shell 1 and the surface of the workpiece 3 can be greatly resolved. That is, even if there is a gap between the shell 1 and the surface of the workpiece 3, the outside air will not enter the chamber 2.

(3) A centrifugal inertial force is generated inside the rotating water layer. The direction of the centrifugal inertial force is radially outward, opposite to the direction of vacuum leakage. It is visually understood that when entering the chamber 2, the air is thrown away by the centrifugal force. Therefore, the inertial centrifugal force can effectively resist the vacuum leakage and protect the vacuum environment inside the chamber 2.

(4) If there is a gap C between the chamber 2 and the surface of the workpiece 3, the water of the rotating water layer distributed in the peripheral region of the chamber 2 flows out of the chamber 2 through the gap C. Therefore, the water continuously flows from the external fluid source 9 into the chamber 2 and flows out of the chamber 2 through the gap C. Since the water continuously flows out through the gap C, it is also difficult for the outside air to enter the chamber 2.

[0026] Finally, the description of "the original fluid originally present in the chamber" will be explained. This description can be understood as follows: When there is no another fluid B of the external fluid source 9 in the chamber 2, the fluid in the chamber 2 is the original fluid A. In this embodiment, this device is used in an air environment. When there is no water of the external fluid source 9 in the chamber 2, the chamber 2 is filled with air. Then, it can be considered that the original fluid A originally present in the chamber 2 is air.

Embodiment 2

[0027] Referring to FIG. 4, Embodiment 2 differs from Embodiment 1 in that the shell 1 is further provided with a suction hole 10, and the suction hole 10 is disposed at a position near the center of the shell 1. One end of the suction hole 10 is connected to a region of the chamber 2 where the another fluid B is not present, and the other end is connected to a vacuum source 12 through a straw 11. The vacuum source 12 adjusts the degree of vacuum of the region of the chamber 2 where the another fluid B is not present. Other structures are the same as those in Embodiment 1, and will not be described again.

[0028] The description will be made by using an example in which the another fluid B is water and the original fluid A is air. In the course of further experiments, it is found that after the vacuum is formed in the chamber 2, a gas dissolved in the water (namely the another fluid) is separated out, and the boiling point of the water is lowered in a low pressure environment, so that water vapor may occur. The air (namely the original fluid) present in the chamber 2, the gas separated out, the water vapor, etc. constitute a mixed gas. The mixed gas has a lower density than water, and therefore accumulates in the central region of the chamber 2, which is the aforementioned region where the another fluid B is not present. Moreover, since the water continuously separates out the gas and generates the water vapor, as time passes, the gas in the central region becomes more and more, thereby squeezing the rotating water layer, and thus the thickness of the rotating water layer is gradually reduced. As the thickness of the rotating water layer becomes smaller, the region of the pressure gradient created by the water layer becomes smaller, which leads to a decrease in the degree of vacuum at the center of the chamber 2, and the adsorption force of the chamber 2 is seriously degraded, eventually losing the adsorption function.

[0029] To resolve this problem, on the basis of the design of the basic solution of Embodiment 1, a suction hole 10 is disposed in the central region of the chamber 2, and the suction hole 10 is connected to the vacuum source 12 through the straw 11. The vacuum source 12 sucks the mixed gas, so that the mixed gas in the central region of the chamber 2 can be eliminated or the volume of the mixed gas in the central region of the chamber 2 can be prevented from increasing. Since the amount of the gas separated out and the water vapor is not large, the power of the vacuum source 12 is very small. In this embodiment, the vacuum source 12 is connected to the central region of the shell through the suction hole 10 and the straw 11, and away from the region of the another fluid B, thereby avoiding sucking away the another fluid B.

Embodiment 3

[0030] The vacuum source 12 is usually driven by a motor (such as a vacuum air pump), and is susceptible to a short circuit if water is sucked into the vacuum source 12. This embodiment proposes a solution. Referring to FIG. 5, the external fluid source 9 contains two other fluids B1 and B2. In this embodiment, B1 is oil and B2 is water, and a description will be made by using this as an example. The shell 1 is further provided with a front inflow hole 71 and a rear inflow hole 72. The front inflow hole 71 is closer to the center of the chamber 2 than the rear inflow hole 72. The external fluid source 9 is connected to the chamber 2 through a front inflow pipe 81 and a rear inflow pipe 82 respectively. Two other fluids of the external fluid source 9 pass through the front inflow hole 71 and the rear inflow hole 72 respectively to flow from the external fluid source 9 into the chamber 2 or flow out of the chamber 2 to the external fluid source 9. The density of the another fluid B1 in the front inflow pipe 81 is less than that of the another fluid B2 in the rear inflow pipe 82 and greater than that of the original fluid A originally present in the chamber 2. An amount of oil and water is injected into the chamber 2. Because the density of the water is the largest and the density of the air (the original fluid A) is the smallest, the fan 5 drives all the fluids in the chamber 2 to rotate under the action of the centrifugal force, and a water layer, an oil layer and an air region are formed in the chamber 2. The oil layer is between the water layer and the air, which effectively separates the water layer from the central air region, thus resolving the problem of water being sucked in by the vacuum source.

[0031] It should be additionally noted that water and oil as other fluids may also share one inflow hole. Other fluid sources 9 may first inject water and then inject oil. In the case of high-speed rotation, the centrifugal force stratifies fluids of different densities, which is independent of the number and locations of inflow holes.

[0032] In addition, during actual use, more kinds of other fluids may be injected into the chamber 2 as needed. The working principle is the same and will not be described here.

Embodiment 4

[0033] In FIG. 4 of Embodiment 2, the external fluid source 9 inputs the another fluid B into the chamber 2. The vacuum source 12 determines the value of the negative pressure of the central region. In this case, if the input flow of the another fluid B is too much, the internal rotating water layer is thickened, which causes the peripheral pressure of the chamber to rise, thereby generating a repulsive force and weakening the overall adsorption force; if the input flow of the another fluid B is insufficient, the internal rotating water layer becomes thinner, which causes the peripheral pressure of the chamber to drop, resulting in a significant pressure difference between the inner side and the outer side of the shell, and causing a vacuum leakage (i.e., outside air flows into the chamber). To well control the flow of the another fluid B, the technical solutions shown in FIG. 6 and FIG. 7 are used.

[0034] According to the technical solutions, the external fluid source 9 is designed into the structure shown in FIG. 6. A water tankwater tank 91 is established outside the shell for external fluid source 9. The another fluid B is injected into the water tankwater tank 91. The water tankwater tank 91 and the chamber 2 are interconnected. The way to connect may be a gap C existing between the shell 1 and the adsorbed surface of the workpiece 3, or a connecting flow channel 15 (shown in FIG. 7) disposed on the side wall of the shell 1. This design of the external fluid source 9 has the following advantages:

(1) The pressure of the another fluid B in the water tankwater tank 91 can be kept the same as the environmental pressure, and no additional pressure control equipment is required.

(2) The another fluid B in the water tankwater tank 91 is connected to the outermost periphery of the chamber 2, and therefore, this ensures that the pressure of the outermost periphery of the chamber 2 is the same as the pressure of the water tank 91, and is also the environmental pressure. In addition, the vacuum source 12 determines the pressure in the central region. The inner and outer side pressures of the rotating water layer are determined, and therefore, the thickness of the water layer can be self-adjusted and a thickness is always maintained.

(3) The water tank 91 isolates the gap C from the external environment, and the outside air cannot enter the chamber through the gap C.

Embodiment 5

[0035] Referring to FIG. 8, in Embodiment 4, a gap D is formed between the water tank 91 and the surface of the workpiece 3. The water in the water tank may flow out through the gap D. Suppressing the outflow of water can reduce the water consumption of the suction device. In this embodiment, the gap D is blocked using a soft sealing body 92, such that the amount of water flowing out can be reduced.

Embodiment 6

[0036] Referring to FIG. 9, in the above embodiment, the water tank 91 is open, and when the suction device is not placed horizontally, the water in the water tank 91 overflows. To resolve this problem, the structure shown in FIG. 9 is used. The water tank 91 forms a semi-closed state. The water tank 91 is connected to an external water tank 96. In this embodiment, the water tank 91 and the external water tank 96 are connected to each other through an inlet pipe 94 and a return pipe 95. A pump 93 is mounted on the input pipe. The pump 93 conveys water of the external water tank 96 to the water tank 91, so that the water tank 91 is filled with water. The water then flows back to the external water tank 96 through the return pipe 95. Since the flow resistance of the return pipe 95 is small, such a water circulation can ensure that the pressure of the water tank 91 is substantially equivalent to the external environmental pressure.

[0037] Instead of connecting the return pipe 95 to the water tank, an outlet of the return pipe 95 may be directly placed in the external environment, so that the water tank 91 is directly connected to the external environment to directly discharge the water to the external environment. This also ensures that the pressure of the water tank 91 is substantially equivalent to the external environmental pressure.

Embodiment 7

[0038] Referring to FIG. 10, Embodiment 7 is further improved on the basis of Embodiment 2. The difference between the two is that in Embodiment 7, the shell 1 is further provided with one or more pressure measuring holes, and the pressure measuring hole connects the chamber and a pressure sensor 13. The pressure sensor 13 is configured to detect the change in pressure within the chamber 2. Other structures are the same as those in Embodiment 2, and will not be described again.

[0039] The working principle of Embodiment 7 is that: after a large number of experiments, it is found that the rotational speed of the fan 5, the thickness of the water layer in the chamber 2, and the degree of vacuum of the vacuum source 12 determine the negative pressure distribution inside the chamber 2. There is a very clear relationship between them. The rotational speed of the fan 5 can be controlled by adjusting the output power of the power component 6, and in addition, it is also very easy to measure the rotational speed of the fan 5; the thickness of the water layer on the periphery of the chamber can be controlled by adjusting the injection flow of a second fluid source 9; the negative pressure of the region of the chamber where the another fluid is not present can be controlled by adjusting the vacuum source 12. The negative pressure at any point inside the chamber 2 and its distribution can be measured by providing one or more pressure measuring holes in the chamber 2 and connecting the pressure sensor 13. It can be seen that the addition of the pressure measuring holes and the pressure sensor 13 makes the suction device a measurable and controllable closed loop control system. The power component 6 and the external fluid source 9 can be used as control components, the rotational speed and the injection flow are used as control variables, and the negative pressure distribution is used as the control output. Since the integral of the negative pressure distribution on the adsorption area is the adsorption force, it may be considered that the adsorption force is the control output.

[0040] In an example shown in FIG. 10, pressure measuring hole 14 are provided in the periphery of the shell 1, the pressure measuring hole is connected to the pressure sensor 13, and the measured pressure is the pressure of the periphery of the chamber 2. When it is found that the pressure measured by the pressure sensor 13 decreases and is lower than a lower limit value, the output rotational speed of the power component 6 is increased to rotate the rotating water layer at a higher speed, so as to increase the pressure to the target value. When it is found that the pressure measured by the pressure sensor 13 increases and is higher than an upper limit value, the output rotational speed of the power component 6 is reduced to lower the pressure to the target value.

[0041] The foregoing descriptions are merely exemplary embodiments of the present invention, but are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A suction device, comprising a shell, wherein the shell is provided with a chamber, the chamber is provided with an opening, a fan is disposed in the chamber, the opening is disposed in a rotating axial direction of the fan, a power component for driving the fan to rotate is disposed on the shell, an fluid source is disposed, another fluid is disposed in the fluid source, the another fluid is different from an original fluid originally present in the chamber, the fluid source is connected to the chamber, the another fluid of the fluid source flows into the chamber to occupy the volume in the chamber, and partially or completely squeezes the original fluid originally present in the chamber out of the chamber, and the fan drives fluids in the chamber to rotate.

2. The suction device according to claim 1, wherein the density of the another fluid is greater than that of the original fluid originally present in the chamber.

3. The suction device according to claim 1 or 2, wherein the shell is further provided with a suction hole, one end of the suction hole is connected to a region of the chamber where the another fluid is not present, and the other end of the suction hole is connected to a vacuum source.

4. The suction device according to claim 1 or 2, wherein the shell is further provided with an inflow hole, and the fluid source is connected to the chamber through an inflow pipe, the another fluid of the fluid source flows from the fluid source into the chamber through the inflow hole or flows out of the chamber to the fluid source, the fan drives fluids in the chamber to rotate, and the fluid source is further provided with a flow regulating device.

5. The suction device according to claim 1 or 2, wherein the shell is further provided with one or more inflow holes, the fluid source is connected to the chamber through the one or more inflow holes, one or more other fluids are disposed in the fluid source and flow from the fluid source into the chamber through the inflow holes or flow out of the chamber to the fluid source, respectively, the one or more other fluids are different from an original fluid originally present in the chamber, and the fan drives fluids in the chamber to rotate.

6. The suction device according to claim 1 or 2, wherein the fluid source further comprises a water tank disposed outside the shell, another fluid is disposed in the water tank, the water tank and the chamber are interconnected, and the water tank and an external environment of the shell are also connected to each other.

7. The suction device according to claim 6, wherein the another fluid in the water tank is connected to the chamber through a gap existing between the shell and an adsorbed surface, or is connected to the chamber through a connecting flow channel disposed on the shell.

8. The suction device according to claim 7, wherein the bottom of an outer wall of the water tank is provided with a soft sealing body for blocking the gap between the outer wall of the water tank and the adsorbed surface.

9. The suction device according to claim 6, wherein the water tank is a semi-closed water tank with the top and side walls closed, and the water tank is provided with an input hole through which the another fluid flows into the water tank.

10. The suction device according to claim 6, wherein the water tank is respectively connected to an external tank of the another fluid through an input pipe and a return pipe, and a pump is mounted on the input pipe.

11. The suction device according to claim 1, wherein the shell is further provided with one or more pressure sensors, and the pressure sensor is used to sense pressure changes within the chamber.

12. The suction device according to claim 2, wherein the original fluid is a gas and the another fluid is a liquid.

13. A suction device, comprising a shell, wherein the shell is provided with a chamber, the chamber is provided with an opening, the suction device has a high-speed rotating liquid in the chamber during operation, and the liquid generates a gas in a low pressure state; and the shell is further provided with a suction hole, one end of the suction hole is connected to the region of the chamber where the gas is located, and the other end of the suction hole is connected to a vacuum source.

14. The suction device according to claim 13, wherein a fan is disposed in the chamber, the opening of the chamber is disposed in a rotating axial direction of the fan, the shell is provided with a power component for driving the fan to rotate, and the fan drives fluids in the chamber to rotate.

15. The suction device according to claim 13 or 14, wherein the suction hole is disposed at a position near the center of the shell.

16. The suction device according to claim 13 or 14, wherein a periphery of the chamber is connected to external environment.

17. The suction device according to claim 16, wherein the periphery of the chamber is connected to the external environment through a gap existing between the shell and an adsorbed surface, or through a connecting flow channel disposed on the shell.

Drawing